PROGBK1: Difference between revisions

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[[File:Progbk1_mvs.jpg|thumb]]
The only non-protected board that can bankswitch and use all [[V ROM]] space. Really common and very useful for homebrew stuff or converts.
The only non-protected board that can bankswitch and use all [[V ROM]] space. Really common and very useful for homebrew stuff or converts.


===P ROMs===
Often used as the PROG board in [[Neo Print]] cartridges.


[[File:Progbk1p.png]]
=P ROMs configuration=
 
[[File:Progbk1p.png|650px]]
 
==EP ROMs /OE==


{| class="wikitable"
{| class="wikitable"
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!J2
!J2
|-
|-
|EP ROMs /OE are /ROMOE
|/ROMOE
|EP ROMs /OE are /PORTOE
|/PORTOE
|}
|}
==P2 ROM /CE==


{| class="wikitable"
{| class="wikitable"
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!J5
!J5
|-
|-
|P2 /CE is A18
|A18
|P2 /CE is /A18
|/A18
|P2 /CE is GND (default)
|GND (default)
|}
|}
==P2 ROM /OE==


{| class="wikitable"
{| class="wikitable"
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!JB1
!JB1
|-
|-
|P2 /OE is /ROMOE
|/ROMOE
|P2 /OE is /PORTOE (default)
|/PORTOE (default)
|P2 /OE is /PORTOE, banks 0 and 1
|/PORTOE, banks 0 and 1
|}
|}
==P1 ROM /OE==


{| class="wikitable"
{| class="wikitable"
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!JB2
!JB2
|-
|-
|P1 /OE is /PORTOE
|/PORTOE
|P1 /OE is /PORTOE AND /ROMOE
|/PORTOE AND /ROMOE
|P1 /OE is /ROMOE (default)
|/ROMOE (default)
|P1 /OE is /PORTOE, banks 2 and 3
|/PORTOE, banks 2 and 3
|}
|}
==P1 ROM /CE==


{| class="wikitable"
{| class="wikitable"
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!J13
!J13
|-
|-
|P1 /CE is A18
|A18
|P1 /CE is /A18
|/A18
|P1 /CE is GND (default)
|GND (default)
|}
|}
==P1 ROM size==


{| class="wikitable"
{| class="wikitable"
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!Nothing
!Nothing
|-
|-
|P1 A19/NC is /PORTADRS
|A19/NC is /PORTADRS (P1 is 16Mbit)
|P1 A19/NC is BANK0 (P1 is 16Mbit)
|A19/NC is BANK0 (because reasons?)
|P1 is 8Mbit
|P1 is 8Mbit
|}
|}
==P2 ROM size==


{| class="wikitable"
{| class="wikitable"
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!JB6
!JB6
|-
|-
|P2 A20//BYTE is VCC (P2 is 16Mbit or less)
|A20//BYTE is VCC (P2 is 16Mbit or less)
|P2 A20//BYTE is BANK1 (P2 is 32Mbit)
|A20//BYTE is BANK1 (P2 is 32Mbit)
|}
|}


The [[P ROM|P1 ROM]] can be 4Mbit, 8Mbit or 16Mbit (27C400/27C800/27C160).
The [[P ROM|P1 ROM]] can be 4Mbit, 8Mbit or 16Mbit (27C400/27C800/27C160).
*ROMs can be halved and mapped to 0x000000~0x0FFFFF or 0x200000~0x2FFFFF.
* ROMs can be halved and mapped to 0x000000~0x0FFFFF or 0x200000~0x2FFFFF.
*If P1 is 4Mbit or 8Mbit, then P2 can contain a bankswitched ROM (same type as P1 plus 27C322). P1 appears in 0x000000~0x0FFFFF. P2 bank appears in 0x200000~0x2FFFFF.
* If P1 is 4Mbit or 8Mbit, then P2 can contain a bankswitched ROM (same type as P1 plus 27C322). P1 appears in 0x000000~0x0FFFFF. P2 bank appears in 0x200000~0x2FFFFF.


[[Bankswitching]] is done with the LS74. It's not needed if the game isn't banked. Any write to an odd address in the [[68k memory map|0x200000~0x2FFFFF]] range will set the bank.
[[Bankswitching]] is done with the LS74. It's not needed if the game isn't banked. Any write to an odd address in the [[68k memory map|0x200000~0x2FFFFF]] range will set the bank.


===V ROM===
=V ROMs configuration=


[[File:Progbk1v.png]]
[[File:Progbk1v.png]]
Line 115: Line 133:
The JV7 to JV14 jumpers need to be set according to the ROM types. If it's less than 32Mbit, the JV7/JV8/JV9/JV10 jumper needs to be set (ground). If it's 32Mbit, the JV11/JV12/JV13/JV14 needs to be set (A20). This is because 32Mbit chips have their /BYTE pin replaced by A20.
The JV7 to JV14 jumpers need to be set according to the ROM types. If it's less than 32Mbit, the JV7/JV8/JV9/JV10 jumper needs to be set (ground). If it's 32Mbit, the JV11/JV12/JV13/JV14 needs to be set (A20). This is because 32Mbit chips have their /BYTE pin replaced by A20.


===Other===
=Other=


The LS08 is used to AND the /PORTOEU and /PORTOEL signals to get a /PORTOE.
The LS08 is used to AND the /PORTOEU and /PORTOEL signals to get /PORTOE.


*4x 1/2/4MiB V ROMs
* 4x 1/2/4MiB V ROMs
*1/2MiB P1 ROM
* 1/2MiB P1 ROM
*1/2/4MiB P2 ROM
* 1/2/4MiB P2 ROM
*2x 512KiB EP1/EP2 ROM
* 2x 512KiB EP1/EP2 ROM
*[[PCM]] chip
* {{Chipname|PCM}} chip
*LS139,LS08,LS74
* LS139, LS08, LS74A


[[Category:Cartridge boards]]
[[Category:Cartridge boards]]

Latest revision as of 18:28, 15 August 2023

The only non-protected board that can bankswitch and use all V ROM space. Really common and very useful for homebrew stuff or converts.

Often used as the PROG board in Neo Print cartridges.

P ROMs configuration

EP ROMs /OE

J1 J2
/ROMOE /PORTOE

P2 ROM /CE

J3 J4 J5
A18 /A18 GND (default)

P2 ROM /OE

J6 J7 JB1
/ROMOE /PORTOE (default) /PORTOE, banks 0 and 1

P1 ROM /OE

J8 J9 J10 JB2
/PORTOE /PORTOE AND /ROMOE /ROMOE (default) /PORTOE, banks 2 and 3

P1 ROM /CE

J11 J12 J13
A18 /A18 GND (default)

P1 ROM size

JB3 JB4 Nothing
A19/NC is /PORTADRS (P1 is 16Mbit) A19/NC is BANK0 (because reasons?) P1 is 8Mbit

P2 ROM size

JB5 JB6
A20//BYTE is VCC (P2 is 16Mbit or less) A20//BYTE is BANK1 (P2 is 32Mbit)

The P1 ROM can be 4Mbit, 8Mbit or 16Mbit (27C400/27C800/27C160).

  • ROMs can be halved and mapped to 0x000000~0x0FFFFF or 0x200000~0x2FFFFF.
  • If P1 is 4Mbit or 8Mbit, then P2 can contain a bankswitched ROM (same type as P1 plus 27C322). P1 appears in 0x000000~0x0FFFFF. P2 bank appears in 0x200000~0x2FFFFF.

Bankswitching is done with the LS74. It's not needed if the game isn't banked. Any write to an odd address in the 0x200000~0x2FFFFF range will set the bank.

V ROMs configuration

There is a maximum of 4 V ROMs which can be 8Mbit, 16Mbit or 32Mbit (27C800/27C160/27C322) for a maximum total size of 4 * 4MiB = 16MiB.

A 4Mbit ROM can also be used, but only if there's one and only if it's in the last used slot.

The size of the largest V ROM is selected with a pair of jumpers on 6 spots (3 possible choices).

Largest V ROM Jumper set
8Mbit (1MiB) JV1+JV2
16Mbit (2MiB) JV3+JV4
32Mbit (4MiB) JV5+JV6

This pair of V ROM jumpers effectively choose a set of 2 of the PCM chip address outputs to input to the LS139, which will enable one out of the 4 V ROMs at a time.

The JV7 to JV14 jumpers need to be set according to the ROM types. If it's less than 32Mbit, the JV7/JV8/JV9/JV10 jumper needs to be set (ground). If it's 32Mbit, the JV11/JV12/JV13/JV14 needs to be set (A20). This is because 32Mbit chips have their /BYTE pin replaced by A20.

Other

The LS08 is used to AND the /PORTOEU and /PORTOEL signals to get /PORTOE.

  • 4x 1/2/4MiB V ROMs
  • 1/2MiB P1 ROM
  • 1/2/4MiB P2 ROM
  • 2x 512KiB EP1/EP2 ROM
  • PCM chip
  • LS139, LS08, LS74A